ID   RNH2_HISS2              Reviewed;         211 AA.
AC   B0UW63;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   03-AUG-2022, entry version 71.
DE   RecName: Full=Ribonuclease HII {ECO:0000255|HAMAP-Rule:MF_00052};
DE            Short=RNase HII {ECO:0000255|HAMAP-Rule:MF_00052};
DE            EC=3.1.26.4 {ECO:0000255|HAMAP-Rule:MF_00052};
GN   Name=rnhB {ECO:0000255|HAMAP-Rule:MF_00052}; OrderedLocusNames=HSM_0258;
OS   Histophilus somni (strain 2336) (Haemophilus somnus).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pasteurellales;
OC   Pasteurellaceae; Histophilus.
OX   NCBI_TaxID=228400;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=2336;
RG   US DOE Joint Genome Institute;
RA   Siddaramappa S., Duncan A.J., Challacombe J.F., Rainey D., Gillaspy A.F.,
RA   Carson M., Gipson J., Gipson M., Bruce D., Detter J.C., Han C.S., Land M.,
RA   Tapia R., Thompson L.S., Orvis J., Zaitshik J., Barnes G., Brettin T.S.,
RA   Dyer D.W., Inzana T.J.;
RT   "Complete sequence of Haemophilus somnus 2336.";
RL   Submitted (FEB-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Endonuclease that specifically degrades the RNA of RNA-DNA
CC       hybrids. {ECO:0000255|HAMAP-Rule:MF_00052}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Endonucleolytic cleavage to 5'-phosphomonoester.; EC=3.1.26.4;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC   -!- COFACTOR:
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00052};
CC       Note=Manganese or magnesium. Binds 1 divalent metal ion per monomer in
CC       the absence of substrate. May bind a second metal ion after substrate
CC       binding. {ECO:0000255|HAMAP-Rule:MF_00052};
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_00052}.
CC   -!- SIMILARITY: Belongs to the RNase HII family. {ECO:0000255|HAMAP-
CC       Rule:MF_00052}.
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DR   EMBL; CP000947; ACA31885.1; -; Genomic_DNA.
DR   RefSeq; WP_012341128.1; NC_010519.1.
DR   AlphaFoldDB; B0UW63; -.
DR   SMR; B0UW63; -.
DR   STRING; 228400.HSM_0258; -.
DR   EnsemblBacteria; ACA31885; ACA31885; HSM_0258.
DR   KEGG; hsm:HSM_0258; -.
DR   HOGENOM; CLU_036532_3_2_6; -.
DR   OMA; YPTKLHL; -.
DR   OrthoDB; 1685277at2; -.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0030145; F:manganese ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0003723; F:RNA binding; IEA:InterPro.
DR   GO; GO:0004523; F:RNA-DNA hybrid ribonuclease activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006401; P:RNA catabolic process; IEA:UniProtKB-UniRule.
DR   CDD; cd07182; RNase_HII_bacteria_HII_like; 1.
DR   Gene3D; 3.30.420.10; -; 1.
DR   HAMAP; MF_00052_B; RNase_HII_B; 1.
DR   InterPro; IPR022898; RNase_HII.
DR   InterPro; IPR001352; RNase_HII/HIII.
DR   InterPro; IPR024567; RNase_HII/HIII_dom.
DR   InterPro; IPR012337; RNaseH-like_sf.
DR   InterPro; IPR036397; RNaseH_sf.
DR   PANTHER; PTHR10954; PTHR10954; 1.
DR   PANTHER; PTHR10954:SF18; PTHR10954:SF18; 1.
DR   Pfam; PF01351; RNase_HII; 1.
DR   SUPFAM; SSF53098; SSF53098; 1.
DR   PROSITE; PS51975; RNASE_H_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Endonuclease; Hydrolase; Manganese; Metal-binding; Nuclease.
FT   CHAIN           1..211
FT                   /note="Ribonuclease HII"
FT                   /id="PRO_1000074925"
FT   DOMAIN          11..200
FT                   /note="RNase H type-2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01319"
FT   BINDING         17
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         18
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
FT   BINDING         109
FT                   /ligand="a divalent metal cation"
FT                   /ligand_id="ChEBI:CHEBI:60240"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00052"
SQ   SEQUENCE   211 AA;  23615 MW;  0ACA5EA9D142AE50 CRC64;
     MTNVFIYPNV EFIAGVDEVG RGPLVGAVVT AAVILDPHNP IEGLKDSKKL SEKKRLLLAE
     EIKQKALAWS LGRAEPAEID KLNILHATML AMQRAVENLK IQPHFVLVDG NRIPQLPMSA
     QAVIKGDSLV AEISAASILA KVARDQEMIE LDRRYPEYAF AQHKGYPTKL HLERLAQFGV
     LPEYRRSFAP VKKLLSTLLS KNHEYVFKIQ K